CVE-2021-47088

In the Linux kernel, the following vulnerability has been resolved:
mm/damon/dbgfs: protect targets destructions with kdamond_lock DAMON
debugfs interface iterates current monitoring targets in
‘dbgfs_target_ids_read()’ while holding the corresponding ‘kdamond_lock’.
However, it also destructs the monitoring targets in
‘dbgfs_before_terminate()’ without holding the lock. This can result in a
use_after_free bug. This commit avoids the race by protecting the
destruction with the corresponding ‘kdamond_lock’.

Notes